BANNED Hacker in the server

He's using a name changer so I only got his steam ID no demo at the moment.
STEAM_0:1:37512130 03:11 157 0 active

EDIT :left already.
I went in to get him, he left when he saw a 47R had joined, so I saw him for a milisecond. I double checked the Steam ID and yes please give that an offline ban.